CN112364456A - Nuclear power plant spring foundation platform system and method capable of monitoring displacement change in real time - Google Patents
Nuclear power plant spring foundation platform system and method capable of monitoring displacement change in real time Download PDFInfo
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- CN112364456A CN112364456A CN202011267027.9A CN202011267027A CN112364456A CN 112364456 A CN112364456 A CN 112364456A CN 202011267027 A CN202011267027 A CN 202011267027A CN 112364456 A CN112364456 A CN 112364456A
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Abstract
The invention discloses a nuclear power plant spring foundation platform system and a method capable of monitoring displacement change in real time, wherein the system comprises a plurality of pillars, vibration isolators and spring foundation platforms, the pillars are sequentially arranged from bottom to top, the vibration isolators are arranged on each pillar, and the spring foundation platforms are arranged on all the vibration isolators; the struts are used for supporting the spring foundation platform, and each strut is provided with at least 4 vibration isolators; each support is provided with at least two supports, the top of each support is provided with a displacement monitoring device which is in contact with the bottom surface of the spring foundation platform, and the displacement monitoring devices are used for acquiring deformation signals; the background host is used for receiving the deformation signals collected by all the supports and displaying and storing all the deformation signals. According to the nuclear power plant spring foundation platform system and the method capable of monitoring displacement changes in real time, the support capable of collecting displacement changes of the spring foundation platform is arranged beside the vibration isolator, and deformation signals are transmitted to the background host for displaying and storing, so that real-time detection under different unit states is achieved.
Description
Technical Field
The invention relates to the field of nuclear power, in particular to a nuclear power plant spring foundation platform system and a nuclear power plant spring foundation platform method capable of monitoring displacement change in real time.
Background
The nuclear power turbine is because of steam humidity is big, and it is higher to strike the influence to the blade, so adopt half-speed turbine design mostly, and this kind of design makes the size huge, the weight is high, and operating frequency will be less than the full-speed machine simultaneously and be 25Hz, again because of traditional steam turbine basic platform frequency is close with 25Hz, in order to avoid resonating with steam turbine operating frequency, so nuclear power half-speed turbine adopts the spring shock insulator to support steam turbine basic platform more, thereby greatly reduced basic platform's natural frequency. From the historical operating condition, the installation quality of the spring foundation has great influence on the vibration condition of the steam turbine shafting center and the unit operation.
At present steam turbine maintenance in-process, maintenance personal can adjust steam turbine shafting center through increasing metal shim in spring shock isolator top, can measure the distance between spring bottom to the basic platform before overhauing simultaneously. However, the above two operations are only for the unit shutdown state, and the load of the base platform is not changed.
During the operation of the unit, especially in the startup and shutdown and power change stages, the load of the basic platform changes gradually, and the change is a blind spot for the maintenance personnel to know the characteristics of the unit without any monitoring means. Meanwhile, the current means for monitoring the change of the foundation platform by measuring the distance from the bottom of the spring to the foundation platform cannot meet the purpose of real-time monitoring, and the deformation caused by the load change of the foundation platform cannot be accurately captured.
Disclosure of Invention
The invention aims to solve the technical problem of providing an improved nuclear power plant spring foundation platform system and method capable of monitoring displacement change in real time, which are used for monitoring the change of a foundation platform during the operation of a unit.
The technical scheme adopted by the invention for solving the technical problems is as follows: the nuclear power plant spring foundation platform system capable of monitoring displacement change in real time is provided, and comprises a plurality of pillars, vibration isolators and a spring foundation platform, wherein the pillars are sequentially arranged from bottom to top, the vibration isolators are arranged on each pillar, and the spring foundation platform is arranged on all the vibration isolators; the struts are used for supporting the spring foundation platform, and each strut is provided with at least 4 vibration isolators; each support is provided with at least two supports, the top of each support is provided with a displacement monitoring device which is in contact with the bottom surface of the spring foundation platform, and the displacement monitoring devices are used for acquiring deformation signals generated by displacement changes of the spring foundation platform; the nuclear power plant spring foundation platform system further comprises a background host, and the background host is used for receiving all the deformation signals collected by the support, and displaying and storing all the deformation signals.
Preferably, the support comprises a base, a support rod arranged on the base and the displacement monitoring device arranged on the top in sequence from bottom to top.
Preferably, the support rod is further provided with an extension rod and a fixture for fixing the displacement monitoring device on the support rod.
Preferably, the base is a magnetic base, and the top surface of the support post is made of a magnetic material.
Preferably, the displacement monitoring device comprises a displacement acquisition module and a signal transmission module, and the background host comprises a signal receiving module, a display module and a storage module; the displacement acquisition module is used for acquiring deformation signals generated by the displacement change of the spring foundation platform, the signal transmission module is connected with the displacement transmission module and transmits the deformation signals to the signal receiving module of the background host, the display module is connected with the signal receiving module and displays the deformation signals, and the storage module is used for storing the deformation signals.
Preferably, the displacement acquisition module is a laser ranging sensor.
Preferably, the spring foundation platform system of the nuclear power plant further comprises a generator, a high-intermediate pressure cylinder, a low-pressure cylinder and a foundation concrete platform, wherein the generator, the high-intermediate pressure cylinder and the low-pressure cylinder are borne on the spring foundation platform, and the foundation concrete platform is arranged around the spring foundation platform.
Preferably, an elastic medium is arranged in the vibration isolator, and the elastic medium is at least one of a spring and a telescopic hydraulic cylinder.
Preferably, the vibration isolator is a spring vibration isolator.
The method capable of monitoring the displacement change in real time is further provided, and the following steps are executed by utilizing the nuclear power plant spring base platform system:
collecting a deformation signal generated by the displacement change of the spring base platform;
transmitting the deformation signal to a background host;
displaying the deformation signal;
and storing the deformation signal.
The beneficial effects of the implementation of the invention are as follows: according to the nuclear power plant spring foundation platform system and the method capable of monitoring displacement changes in real time, the support capable of collecting the displacement changes of the spring foundation platform is arranged beside the vibration isolator, and deformation signals collected by the support are transmitted to the background host for displaying and storing, so that the real-time detection of the turbine spring foundation platform under different unit states is realized, and effective data support is provided for mastering the deformation conditions of the foundation platform. The nuclear power plant spring foundation platform system and the method capable of monitoring displacement change in real time solve the defect that the traditional measurement process cannot be monitored in real time, and simultaneously make up for the blank of domestic research on the deformation condition of the spring foundation platform.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a macro-architectural schematic of a nuclear power plant spring based platform system in accordance with some embodiments of the invention;
FIG. 2 is a schematic side view of a nuclear power plant spring based platform system according to some embodiments of the present disclosure;
FIG. 3A is a schematic diagram of the construction of the isolator of FIG. 2 in some embodiments;
FIG. 3B is a schematic illustration of the isolator of FIG. 2 in an alternate embodiment;
FIG. 4 is a schematic illustration of the stent of FIG. 2 in some embodiments;
fig. 5 is a schematic diagram of the operation of some embodiments of the invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Fig. 1-5 illustrate a nuclear power plant spring based platform system with real-time monitoring of displacement changes for monitoring changes in the spring based platform 100 during unit operation, according to some embodiments of the present invention. The nuclear power plant spring foundation platform system capable of monitoring displacement changes in real time in the embodiment of the invention comprises a spring foundation platform 100, a foundation concrete platform 200, a generator (not shown), a high-medium pressure cylinder (not shown), a low-pressure cylinder (not shown) and a background host computer 300, wherein the foundation concrete platform 200 is arranged around the spring foundation platform 100, a turbine generator, the high-medium pressure cylinder and the low-pressure cylinder are carried by the spring foundation platform 100, and the background host computer 300 is arranged on the background and is operated by background workers.
As shown in fig. 1 and 2, in the nuclear power plant spring foundation platform system capable of monitoring displacement changes in real time according to some embodiments of the present invention, the spring foundation platform 100 is located inside the foundation concrete platform 200, and the foundation concrete platform 200 is disposed around the spring foundation platform 100, and the two are nested. The spring base platform 100 carries a generator, a high and medium pressure cylinder, and a low pressure cylinder.
In some embodiments, spring foundation platform 100 is about 70m long, about 21m wide, and about 7000t total weight, and includes 1 high and medium pressure cylinder, 3 low pressure cylinders, 1 generator, and foundation concrete platform 200. A total of 90 spring isolators 20 are supported above 10014 concrete columns of the spring foundation platform.
Referring to fig. 1 to 5, a spring foundation platform system for a nuclear power plant, which can monitor displacement changes in real time according to some embodiments of the present invention, mainly includes a plurality of columns 10, vibration isolators 20 disposed on each column 10, and a spring foundation platform 100 disposed on all the vibration isolators 20, which are sequentially disposed from bottom to top; wherein, the struts 10 are used for supporting the spring foundation platform 100, and at least 4 vibration isolators 20 are arranged on each strut 10; at least two brackets 30 are arranged around each vibration isolator 20, a displacement monitoring device 35 which is in contact with the bottom surface of the spring foundation platform 100 is arranged at the top of each bracket 30, and the displacement monitoring device 35 is used for collecting deformation signals generated by the displacement change of the spring foundation platform 100; the spring base platform system of the nuclear power plant further includes a background host 300, which is used for receiving deformation signals collected by all the supports 30, and displaying and storing all the deformation signals.
In some embodiments, a method for monitoring displacement changes of a spring foundation platform of a nuclear power plant in real time mainly comprises the following steps:
the method comprises the following steps: at least more than 4 supports 30 are dispersedly, uniformly and symmetrically erected above each spring foundation column, namely the top of the support column 10 one by one, and the displacement monitoring device 35, preferably a displacement sensor, on each support 30 points to the bottom of the spring foundation platform 100; the displacement monitoring device 35 is then commissioned available with the display module 302 of the background host 300. Preferably, the display module 302 is a displacement sensor debugging screen.
Step two: the data acquired by the displacement monitoring device 35, namely the deformation signal, is connected with the gateway through a wireless transmission function, and then transmitted to a data display screen, namely a display module 302, through a Modbus protocol, and stored in a USB flash disk;
step three: the USB flash disk data are imported into the background host computer 300, and the change situation of the spring foundation is analyzed according to the data of different time periods and different time intervals at the required screening position.
Referring to fig. 2, the columns 10 are used for supporting the spring foundation platform 100, the number of the columns 10 is several, and at least 4 vibration isolators 20 are arranged on each column 10 and are uniformly distributed on the columns 10.
The shape of the post 10 may be conventional, and in some embodiments, the post 10 is T-shaped. It is understood that the shape of the support post 10 may be other forms, and is not particularly limited as long as the related function can be achieved.
The vibration isolators 20 are arranged on the support posts 10, the number of the vibration isolators 20 is several, at least 4 vibration isolators 20 are arranged on each support post 10, and at least two brackets 30 are arranged on each support post 10. The spring foundation platform 100 is disposed on all of the vibration isolators 20, and at least two cradles 30 are disposed around each vibration isolator 20.
In some embodiments, an elastic medium is disposed within vibration isolator 20, the elastic medium being at least one of a spring, a telescoping cylinder. It is understood that the elastic medium in the vibration isolator 20 may be in other forms, and is not particularly limited thereto, as long as the elastic function is achieved. Preferably, the vibration isolator 20 is a spring vibration isolator. As shown in fig. 3A and 3B, the number of springs on the spring vibration isolator is not limited, and may be 4 sets of springs or 6 sets of springs, and the setting is performed according to specific requirements.
The bracket 30 is disposed around the vibration isolator 20. The top of the support 30 is provided with a displacement monitoring device 35 contacting with the bottom surface of the spring foundation platform 100, and the displacement monitoring device 35 is used for acquiring a deformation signal generated by the displacement change of the spring foundation platform 100.
As shown in fig. 2 and 4, the support 30 includes a base 31, a support rod 32 disposed on the base 31, an extension rod 34, a fixture 33, and a displacement monitoring device 35 disposed on the top of the support rod 32.
The base 31 is a magnetic base, and the top surface of the pillar 10 is made of magnetic material. In some embodiments, the magnetic base 31 is attached to the magnetic material of the top of the stanchion 10 where the isolator 20 is located, which provides the benefit of increased stability.
In some embodiments, the displacement monitoring device 35 is directly connected to the support rod 32.
Preferably, an extension rod 34 and a fixture 33 for fixing the displacement monitoring device 35 on the support rod 32 are further provided on the support rod 32.
As shown in fig. 4 and 5, the displacement monitoring device 35 includes a displacement acquisition module 351 and a signal transmission module 352, and the background host 300 includes a signal receiving module 301, a display module 302 and a storage module 303; the displacement acquisition module 351 is used for acquiring deformation signals generated by displacement changes of the spring base platform 100, the signal transmission module 352 is connected with the displacement transmission module and transmits the deformation signals to the signal receiving module 301 of the background host 300, the display module 302 is connected with the signal receiving module 301 and displays the deformation signals, and the storage module 303 is used for storing the deformation signals.
Preferably, the displacement acquisition module 351 is a laser ranging sensor with performance parameters as listed in table 1.
Table 1: laser ranging sensor performance parameter table
The advantage that sets up like this is, the laser rangefinder sensor that adopts has improved measurement accuracy greatly than traditional measuring method, has improved the reliability and the validity of data. In some embodiments, the displacement acquisition module 351, that is, the laser ranging sensor transmits the acquired 4-20 mA deformation signal to the nodes, and a single node can be simultaneously accessed to the deformation signals sent by the 4 paths of displacement acquisition modules 351; the node is in wireless connection with the gateway; the deformation signal is transmitted to the background host 300 through the signal transmission module 352 and the signal receiving module 301, and the display module 302 and the storage module 303 are communicated with the gateway through a transmission protocol, and finally data are displayed and stored. Such benefit is, the wireless transmission and the storage system of adoption compare traditional a lot of and climb vertical ladder measuring method, greatly reduced human cost and operation risk.
The following describes specific steps of a method for monitoring the change in displacement in real time according to some embodiments of the present invention with reference to fig. 1-5. In the embodiment of the invention, the method for monitoring the displacement change in real time utilizes the nuclear power plant spring base platform system to execute the following steps:
collecting a deformation signal generated by the displacement change of the spring foundation platform 100;
transmitting the deformation signal to the background host 300;
displaying the deformation signal;
the deformation signal is stored.
In some embodiments, the method for monitoring the displacement change in real time comprises the following main steps:
the method comprises the following steps: at least more than 4 supports 30 are dispersedly, uniformly and symmetrically erected above each spring foundation column, namely the top of the support column 10 one by one, and the displacement monitoring device 35, preferably a displacement sensor, on each support 30 points to the bottom of the spring foundation platform 100; the displacement monitoring device 35 is then commissioned available with the display module 302 of the background host 300. Preferably, the display module 302 is a displacement sensor debugging screen.
Step two: the data acquired by the displacement monitoring device 35, namely the deformation signal, is connected with the gateway through a wireless transmission function, and then transmitted to a data display screen, namely a display module 302, through a Modbus protocol, and stored in a USB flash disk;
step three: the USB flash disk data are imported into the background host computer 300, and the change situation of the spring foundation is analyzed according to the data of different time periods and different time intervals at the required screening position.
In the whole process of data acquisition, transmission and acquisition, the required equipment mainly comprises the following devices:
and finally, importing the acquired data into an EXCEL table to obtain the change conditions of the top basic platform of the corresponding spring support 10 at different time, and connecting all the points into a change curve of the spring foundation.
The data of this monitoring shows that the basic spring of the turbonator at the measuring point shows some remarkable change characteristics:
1. after the shaft seal and the vacuum operation, the spring is compressed until the spring is stable before impact and reaches about 0.20mm at most;
2. the spring begins to extend along with the unit is switched to be connected with the grid, but the variation is small because the time is short;
3. after the unit is connected to the grid, the spring extends faster, the extension amount is increased along with the power change, the extension amount is basically stable when the power is stable, and the extension amount changes about 0.06mm when the power is stable and when the power is 250 MW;
4. the spring continuously extends along with the continuous power rise of the unit, and changes about 0.40mm when the power reaches 790MW compared with the initial power;
5. finally, as the unit reaches full power, the spring stretches about 0.55mm from its initial state.
By implementing the nuclear power plant spring base platform system and the method capable of monitoring displacement change in real time in the embodiment of the invention, the change situation from the time when the basic platform of the turbonator is automatically turned into operation to the time when the unit is full of power can be mastered, and the change rule of the load of the basic platform during the ascending of the unit can be further mastered, so that the state of the basic platform during the running of the unit can be deduced according to the state of the basic platform during overhaul, and the running stability of the unit can be improved.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that several modifications and adaptations to those skilled in the art without departing from the principles of the present invention should also be considered within the scope of the present invention.
Claims (10)
1. A nuclear power plant spring foundation platform system capable of monitoring displacement change in real time is characterized by comprising a plurality of pillars (10) which are sequentially arranged from bottom to top, vibration isolators (20) arranged on each pillar (10) and a spring foundation platform (100) arranged on all the vibration isolators (20); wherein the struts (10) are used for supporting the spring foundation platform (100), and at least 4 vibration isolators (20) are arranged on each strut (10); each strut (10) is provided with at least two supports (30), the top of each support (30) is provided with a displacement monitoring device (35) which is in contact with the bottom surface of the spring foundation platform (100), and the displacement monitoring devices (35) are used for acquiring deformation signals generated by displacement changes of the spring foundation platform (100); the nuclear power plant spring foundation platform system further comprises a background host (300), wherein the background host (300) is used for receiving all the deformation signals collected by the support (30) and displaying and storing all the deformation signals.
2. The nuclear power plant spring foundation platform system of claim 1, wherein the support (30) comprises a base (31), a support rod (32) disposed on the base (31), and the displacement monitoring device (35) disposed on top in sequence from bottom to top.
3. A nuclear power plant spring foundation platform system according to claim 2, characterized in that an extension rod (34) and a clamp (33) for fixing the displacement monitoring device (35) on the support rod (32) are further provided on the support rod (32).
4. The nuclear power plant spring based platform system of claim 2 wherein the base (31) is a magnetic base and the top surface of the column (10) is made of magnetic material.
5. The nuclear power plant spring based platform system of claim 1, wherein the displacement monitoring device (35) comprises a displacement acquisition module (351) and a signal transmission module (352), and the background host (300) comprises a signal receiving module (301), a display module (302) and a storage module (303); the displacement acquisition module (351) is used for acquiring deformation signals generated by displacement changes of the spring foundation platform (100), the signal transmission module (352) is connected with the displacement transmission module and transmits the deformation signals to the signal receiving module (301) of the background host (300), the display module (302) is connected with the signal receiving module (301) and displays the deformation signals, and the storage module (303) is used for storing the deformation signals.
6. The nuclear power plant spring based platform system of claim 5 wherein the displacement acquisition module (351) is a laser ranging sensor.
7. The nuclear plant spring foundation platform system of any of claims 1-6, further comprising a generator carried on the spring foundation platform (100), a high intermediate pressure cylinder, a low pressure cylinder, and a foundation concrete platform (200) disposed about the spring foundation platform (100).
8. The nuclear power plant spring foundation platform system of any of claims 1-6, wherein an elastic medium is disposed within the vibration isolator (20), the elastic medium being at least one of a spring and a telescopic hydraulic cylinder.
9. The nuclear power plant spring foundation platform system of claim 8, wherein the vibration isolator (20) is a spring vibration isolator.
10. A method for real-time monitoring of displacement changes, characterized by using the nuclear power plant spring based platform system according to any of claims 1-9 to perform the following steps:
collecting deformation signals generated by the displacement change of the spring base platform (100);
transmitting the deformation signal to a background host (300);
displaying the deformation signal;
and storing the deformation signal.
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Inventor after: Guan Yunsheng Inventor after: Su Zhigang Inventor after: Zheng Huabing Inventor after: Zhang Yahui Inventor after: Li Shenglu Inventor after: Zhou De Inventor after: Liu Siwei Inventor after: Duan Xiandong Inventor after: Wang Xingrui Inventor after: Wei Jian Inventor after: Yuan Shuai Inventor after: Jia Kaili Inventor before: Guan Yunsheng |